About: Diffusion of penetrants in compact polyethylene

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The objective of this study is the transport of low molecular weight penetrants, such as ethylene, propylene and 1-hexene, in compact polyethylene or polypropylene. Experimental measurements of diffusion in compact polymer particles or thin films were performed gravimetrically and the measured time-evolution of the sorbed species was corrected for buoyancy effects. Polyolefins are semi-crystalline materials consisting from crystalline and amorphous phase. Additional diffusion measurements were therefore performed in polymer melt consisting of a purely amorphous polymer. Dynamics of gas diffusion in the sample was measured as a response to a step change of pressure. Diffusion coefficients were estimated by comparison of model and experimental curves. Dependence of diffusivity on temperature, penetrant pressure (i.e., concentration) and polymer grade were obtained. Obtained results are important not only for the industrial production of polyolefins (where diffusion affects the copolymer composition), bu The objective of this study is the transport of low molecular weight penetrants, such as ethylene, propylene and 1-hexene, in compact polyethylene or polypropylene. Experimental measurements of diffusion in compact polymer particles or thin films were performed gravimetrically and the measured time-evolution of the sorbed species was corrected for buoyancy effects. Polyolefins are semi-crystalline materials consisting from crystalline and amorphous phase. Additional diffusion measurements were therefore performed in polymer melt consisting of a purely amorphous polymer. Dynamics of gas diffusion in the sample was measured as a response to a step change of pressure. Diffusion coefficients were estimated by comparison of model and experimental curves. Dependence of diffusivity on temperature, penetrant pressure (i.e., concentration) and polymer grade were obtained. Obtained results are important not only for the industrial production of polyolefins (where diffusion affects the copolymer composition), bu (en)
Title	Diffusion of penetrants in compact polyethylene Diffusion of penetrants in compact polyethylene (en)
skos:prefLabel	Diffusion of penetrants in compact polyethylene Diffusion of penetrants in compact polyethylene (en)
skos:notation	RIV/60461373:22340/09:00021980!RIV10-MSM-22340___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA104/07/1127), Z(MSM6046137306)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Kosek, Juraj Meisterová, Lucie Bobák, Marek Holeček, Oldřich
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	310531
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/09:00021980
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	sorption equilibria; diffusion in polymers; polyolefins (en)
http://linked.open.../riv/klicoveSlovo	polyolefins sorption equilibria diffusion in polymers
http://linked.open...ontrolniKodProRIV	[EBF48A8E643F]
http://linked.open...v/mistoKonaniAkce	Tatranské Matliare
http://linked.open...i/riv/mistoVydani	Bratislava
http://linked.open...i/riv/nazevZdroje	Proceedings of 36th International Conference of Slovak Society of Chemical Engineering
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Mathematical modeling and experimental study of the evolution of meso-scopic structure of polymeric materials
http://linked.open...UplatneniVysledku	2009
http://linked.open...iv/tvurceVysledku	Gregor, Tomáš Kosek, Juraj Bobák, Marek Holeček, Oldřich Pecháčková, Lucie
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2009-05-25 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Reakčně-transportní chemicko-inženýrské systémy a jejich dynamické chování, modelování a řízení chemických a biotechnologických procesů
number of pages	9 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Slovenská technická univerzita v Bratislave
https://schema.org/isbn	978-80-227-3072-3
http://localhost/t...ganizacniJednotka	22340
is http://linked.open...avai/riv/vysledek of	Diffusion of penetrants in compact polyethylene Diffusion of penetrants in compact polyethylene Diffusion of penetrants in compact polyethylene Diffusion of penetrants in compact polyethylene

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